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#include "u.h"
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#include "../port/lib.h"
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#include "mem.h"
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#include "dat.h"
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#include "fns.h"
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#include "../port/error.h"
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#include "ip.h"
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static void	pktbind(Ipifc*, int, char**);
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static void	pktunbind(Ipifc*);
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static void	pktbwrite(Ipifc*, Block*, int, uchar*);
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static void	pktin(Fs*, Ipifc*, Block*);
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Medium pktmedium =
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{
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.name=		"pkt",
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.hsize=		14,
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.mintu=		40,
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.maxtu=		4*1024,
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.maclen=	6,
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.bind=		pktbind,
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.unbind=	pktunbind,
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.bwrite=	pktbwrite,
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.pktin=		pktin,
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};
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/*
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 *  called to bind an IP ifc to an ethernet device
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 *  called with ifc wlock'd
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 */
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static void
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pktbind(Ipifc*, int argc, char **argv)
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{
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	USED(argc, argv);
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}
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/*
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 *  called with ifc wlock'd
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 */
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static void
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pktunbind(Ipifc*)
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{
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}
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/*
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 *  called by ipoput with a single packet to write
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 */
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static void
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pktbwrite(Ipifc *ifc, Block *bp, int, uchar*)
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{
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	/* enqueue onto the conversation's rq */
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	bp = concatblock(bp);
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	if(ifc->conv->snoopers.ref > 0)
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		qpass(ifc->conv->sq, copyblock(bp, BLEN(bp)));
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	qpass(ifc->conv->rq, bp);
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}
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/*
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 *  called with ifc rlocked when someone write's to 'data'
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 */
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static void
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pktin(Fs *f, Ipifc *ifc, Block *bp)
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{
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	if(ifc->lifc == nil)
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		freeb(bp);
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	else {
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		if(ifc->conv->snoopers.ref > 0)
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			qpass(ifc->conv->sq, copyblock(bp, BLEN(bp)));
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		ipiput4(f, ifc, bp);
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	}
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}
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void
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pktmediumlink(void)
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{
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	addipmedium(&pktmedium);
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}